Degree of dental surgery: University of Athens, Greece Orthodontic specialty certificate: The Ohio State University, USA Master of Science (MS) in orthodontics: The Ohio State University, USA Fellowship in craniofacial orthodontics: University of Texas, Dallas, USA Dr. med dent in biomechanics: University of Bonn, Germany Master of Science (MSc) in clinical trials: London School of Hygiene & Tropical Medicine, UK PhD in Epidemiology: Medical School, University of Ioannina, Greece Master Science: Biostatistics, University of Hasselt, Belgium: Habilitation: University of Bern, Switzerland Associate professor: University of Bern, Switzerland Diplomate of the American Board of Orthodontics External tutor for the MS in clinical trials at LSHTM, UK Associate Editor in the American Journal of Orthodontics and Dentofacial Orthopedics Over 330 scientific publications in peer-reviewed biomedical journals and 2 published books in clinical orthodontics and clinical research methods